PBDB Interval

International Chronostratigraphic Timescale

The interval definitions in this timescale are derived from the following sources:

K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view

There are 59 timescales which overlap this one. show

Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 126158 collections

Show less time

Show linear time

International Chronostratigraphic Timescale			Devonian Subages	Cambrian of Australia	Obsolete Names for ICS Units			Ordovician of Ibero-Bohemia				Cambrian of China		Devonian of Czechoslovakia	Devonian of France	Cambrian of West Avalonia
Quaternary	Holocene	Meghalayan															0
		Northgrippian															0.0042
		Greenlandian															0.0082
	Pleistocene	Late Pleistocene															0.0117
		Chibanian															0.129
		Calabrian															0.774
		Gelasian															1.8
Neogene	Pliocene	Piacenzian			Tertiary †												2.58
	Pliocene	Zanclean															3.6
	Miocene	Messinian															5.333
		Tortonian															7.246
		Serravallian															11.63
		Langhian															13.82
		Burdigalian															15.98
		Aquitanian															20.44
Paleogene	Oligocene	Chattian															23.03
	Oligocene	Rupelian															27.82
	Eocene	Priabonian															33.9
		Bartonian															37.71
		Lutetian															41.2
		Ypresian															47.8
	Paleocene	Thanetian															56
		Selandian															59.2
		Danian															61.6
Cretaceous	Late Cretaceous	Maastrichtian															66
		Campanian															72.1
		Santonian															83.6
		Coniacian															86.3
		Turonian															89.8
		Cenomanian															93.9
	Early Cretaceous	Albian															100.5
		Aptian															113
		Barremian															121.4
		Hauterivian															125.77
		Valanginian															132.6
		Berriasian															139.8
Jurassic	Late Jurassic	Tithonian															145
		Kimmeridgian															149.2
		Oxfordian															154.8
	Middle Jurassic	Callovian															161.5
		Bathonian															165.3
		Bajocian															168.2
		Aalenian															170.9
	Early Jurassic	Toarcian															174.7
		Pliensbachian															184.2
		Sinemurian															192.9
		Hettangian															199.5
Triassic	Late Triassic	Rhaetian															201.4
		Norian															208.5
		Carnian															227
	Middle Triassic	Ladinian															237
	Middle Triassic	Anisian															242
	Early Triassic	Olenekian															247.2
	Early Triassic	Induan															251.2
Permian	Lopingian	Changhsingian															251.902
	Lopingian	Wuchiapingian				Longtanian †											254.14
	Guadalupian	Capitanian															259.51
		Wordian															264.28
		Roadian															266.9
	Cisuralian	Kungurian															273.01
		Artinskian															283.5
		Sakmarian															290.1
		Asselian															293.52
Carboniferous	Pennsylvanian	Gzhelian															298.9
		Kasimovian	303.7
		Moscovian	307
		Bashkirian	315.2
	Mississippian	Serpukhovian	323.2
		Visean	330.9
		Tournaisian	346.7
Devonian	Late Devonian	Famennian	Late Famennian	Famennian			358.9
			Middle Famennian				365.3 *
			Early Famennian				368.5 *
		Frasnian	Late Frasnian	Frasnian			372.2
			Middle Frasnian				375.4 *
			Early Frasnian				379.3 *
	Middle Devonian	Givetian	Late Givetian	Srbsko			Givetian	382.7
			Middle Givetian					383.7 *
			Early Givetian					385.9 *
		Eifelian	Late Eifelian	Chotec			Couvinien	387.7
		Eifelian	Early Eifelian	Chotec				390.3 *
	Early Devonian	Emsian	Late Emsian	Daleje/Zlichovian				393.3
		Emsian	Early Emsian	Daleje/Zlichovian				398.3 *
		Pragian	Pragian	Pragian				407.6
		Pragian	Pragian	Pragian			Coblencien	408.2 *
		Lochkovian	Late Lochkovian	Lochkovian			Gedinnine	410.8
			Middle Lochkovian					412.8 *
			Early Lochkovian					415.6 *
Silurian	Pridoli						419.2
	Ludlow	Ludfordian					423
	Ludlow	Gorstian					425.6
	Wenlock	Homerian					427.4
	Wenlock	Sheinwoodian					430.5
	Llandovery	Telychian					433.4
		Aeronian					438.5
		Rhuddanian					440.8
Ordovician	Late Ordovician	Hirnantian					Kosovian	443.8
		Katian					Kralodvorian	Bohdalec †	445.2
		Katian					Berounian		449.7 *
		Sandbian							453
									Zahorany †/Vinice	Letna †	456.2 *
								Liben †			458 *
	Middle Ordovician	Darriwilian									458.4
							Dobrotivian				458.5 *
							Oretanian				459.7 *
								Sarka †			461.7 *
		Dapingian						Klabava †			467.3
		Dapingian					Arenigian				468
	Early Ordovician	Floian					Arenigian				470
	Early Ordovician	Tremadocian					Tremadocian				477.7
Cambrian	Furongian	Stage 10					Datsonian					Niuchehean	Taoyuanian †	485.4
		Stage 10					Payntonian					Niuchehean		486.8 *
		Jiangshanian					Iverian					Jiangshanian		489.5
		Paibian					Idamean					Paibian		494
		Paibian					Idamean					Paibian	Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian					Mindyallan					Series 3 †	Guzhangian	Wangcunian †	497
							Mindyallan								Arcadian	498.4
							Boomerangian									499
		Drumian					Undillan						Drumian			500.5
		Drumian					Floran						Drumian			503
		Wuliuan				Templetonian	Stage 5 †						Wuliuan/Taijangian			504.5
		Wuliuan				Ordian	Stage 5 †						Wuliuan/Taijangian			507.8 *
	Series 2	Stage 4				Ordian							Duyunian		Branchian	509
		Stage 4											Duyunian			510.8 *
		Stage 3											Nangaoian			514
		Stage 3											Nangaoian		Placentian	517.1
	Terreneuvian	Stage 2											Meishucunian			521
		Fortunian											Meishucunian			529
		Fortunian											Jinnigian			530.7
																	538.8